a(n) = [x^n] Product_{k>=1} ((1 - x^k)/(1 + x^k))^sigma_n(k).
A321068
a(n) = [x^n] Product_{k>=1} ((1 - x^k)/(1 + x^k))^sigma_n(k).
Terms
- a(0) =1a(1) =-2a(2) =-8a(3) =-22a(4) =294a(5) =24982a(6) =1372372a(7) =10145326a(8) =-38651841784
External references
- oeis: A321068